Science 1 Marks Question

What happens in the process of exhalation?

Pick the odd-one-out from each of the groups given below on the basis of respiratory organs. Give reason for your answer. Crocodile, whale, dolphin, fish.

Why we should cover our nose while sneezing?

A part from stomata another structure is used by plants to respire. Name that structure.

Ravi is sleeping, his rate of breathing will be slowest or higher?

Why does a fish die when kept outside water, even though there is oxygen in the surrounding air?

What happens when we inhale air? in exhaled air.

Fill in the blank with suitable word. Diaphragm forms the __________ of the chest cavity.

What is the difference between cellular respiration and internal respiration?

How does exchange of gases take place in the plants?

What is the end product of anaerobic respiration?

How does the exchange of gases occur in breathing?

Why we feel hungry after a physical activity?

Why we should eat regularly?

Our nostrils has hair and mucous. What is the need to have them in our nasal cavity?

Pick the odd-one-out from each of the groups given below on the basis of respiratory organs. Give reason for your answer. Lizard, cow, earthworm, snake.

When oxygen enters our body it combines with haemoglobin to form a new substance. What is that new product.

In some animals, exchange of gases takes place through its thin and moist skin. Name one such animal.

Floor of chest cavity refers to which organ of respiration?

What is the total percentage of oxygen and carbon dioxide in inhaled air and exhaled air?

How respiration does occur in plants?

What happens to your breathing rate when you:

• Exercise.
• Go to sleep.

Fill in the blank with suitable word.
Cockroaches breathe with the help of air tubes called _________.

Explain respiration in plants.

Why mountaineers carry oxygen with them?

A food stall owner was preparing dough for making bhaturas. He added a pinch of yeast and sugar to the dough and left it in a warm place. After few hours, the dough had risen. There was a sour smell too.
Why did the dough rise?

Why human breathing mechanism is called tidal breathing?

Which of the two is usually oxidized during respiration? Carbohydrate or fats?

Certain small pores are present on the surface of plant through which gaseous exchange occurs. Identify these pores?

Which cell organelle is a site for cellular respiration?

What will be the direction of diaphragm as we breathe in, and ribs move up or expand?

What is the site of cellular respiration?

On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air coming out of their mouth looked like smoke. They were amused and wondered how it happened. Help them find the answer.

Fill in the blank with suitable word. Exchange of gases in the leaves takes place with the help of _______.

Name the respiratory organ of earthworm.

What are different types of respiration.

Which gas present in air is essential for aerobic respiration? What is the role of this gas during respiration?

Respiration is a continous process. What is the need for it to be continuous rather than being like photosynthesis?

Name the respiratory organ of frogs.

Name a single celled fungus and respires anaerobically to produce alcohol.

The process of fermentation is based on which principle?

Explain cellular respiration.

Paheli participated in a 400m race competition held at her school and won the race. When she came home she had mixed feelings of joy and pain as she had cramps in her leg muscles. After a massage she was relieved of the pain. Answer the following questions related to the situation. What can be the possible reasons for the pain in her legs?

Insects have a special organ present to carry out respiration. What is that organ called?

How does exchange of gases take place in unicellular and smaller multicellular animals?

Write short notes on gills.

Which product in formed after anaerobic respiration in calf muscles?

What role does hair present in nasal cavity play in the process of respiration?

What is the percentage of oxygen in the inhaled air?

How do frogs breathe on land and in water?

Swati is doing exercise, his rate of breathing will be slowest or higher?

When breathe is released after holding it for few minutes. What happens and give reason for its occurrence?

Rearrange the following parts of the Respiratory system in order. Trachea, nose, alveoli, bronchi, nasal cavity, bronchiole.

Name the organisms which respire using anaerobic mode. Give an example of ane such organism.

Give the name of respiratory organs in following animals.

1. Fish.
2. Human being.

The cellular respiration process takes place in which cell organelle?

How do birds breathe?

Write the difference in the composition of inhaled and exhaled air.

What is anaerobic respiration?

Fill in the blank with suitable word. The roots of a plant take up oxygen from the __________ trapped between the _________ particles.

The vocal ability of humans is the responsibility of an organ commonly known as voice box. What is its scientific name?

Name the respiratory organs in frogs.

When we exhale or breathe out, percentage of a certain gas is high. Name the gas.

How does breathing take place in fishes?

Write the path of the air from the nasal cavity to the lungs.

Pick the odd-one-out from each of the groups given below on the basis of respiratory organs. Give reason for your answer. cockroach, grasshopper, snail, ant.

Why is smoking bad for us?

Why do frogs have thin and moist skin?

Mark the following statement as True or False. Correct the false statement. Oxygen breaks down glucose outside the cells of organisms.

How do the plants breathe in oxygen?

What is the normal range of breathing rate per minute in an adult person?

What is tidal volume?

Explain respiration in water animals.

A food stall owner was preparing dough for making bhaturas. He added a pinch of yeast and sugar to the dough and left it in a warm place. After few hours, the dough had risen. There was a sour smell too. Why did the dough smell sour?

Define breathing rate.

What are the products of anaerobic respiration?

What is breathing rate?

On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air coming out of their mouth looked like smoke. They were asumed and wondered how it happened. Help them to find the answer.

Why should you breathe through your nose and not your mouth?

State the name of wind pipe.

Name the animal who does dual breathing?

How do insects breathe?

What are the end products of aerobic respiration.

Why yeast is used in wine making industry?

Is the rate of breathing same for all the respiring organism?

Mark the following statement as True or False. Correct the false statement. Insects have spiracles on the Lower surface of the body.

Where is diaphragm located in the human body?

Pick the odd-one-out from each of the groups given below on the basis of respiratory organs. Give reason for your answer. Snake, tadpole, crow, goat.

What is the percentage of carbon dioxide in inhaled air?

Mark the following statement as True or False. Correct the false statement.
Frogs can breathe through their skin as well as lungs.

What changes are observed in diaphragm during inhalation?

Sometimes we see that farmers loosen the soil. What is the reason behind it?

Explain respiration in earthworm.

Name the respiratory organ of birds.

Name the two steps in breathing.

How does exchange of gases take place in insects?

What happens during increased physical activity?

Various organs constitute the respiratory system of human. These organs are located according to their functions. Identify them.

Name the tiny pores present in the leaves of the plants for exchange of gases.